Comments (5)
你需要hook的是自己so库中对execve的调用吧?
这样?
xhook_register(".*/libmy.so$", "execve", (void *)new_execve, (void**)&old_execve);
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你需要hook的是自己so库中对execve的调用吧?
这样?xhook_register(".*/libmy.so$", "execve", (void *)new_execve, (void**)&old_execve);
不是 我是需要hook libc中的execve的调用,发现貌似无法hook成果,没法拦截,我使用了 inline hook就成功了
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你的情况xhook确实hook不到的。因为execve的实现就在libc.so中,所以它内部调用execve肯定被编译优化了,不走PLT/GOT了。
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你的情况xhook确实hook不到的。因为execve的实现就在libc.so中,所以它内部调用execve肯定被编译优化了,不走PLT/GOT了。
但是我能够成功hook mmap或者open等等一些libc的函数,单单exec族的hook不到,这些函数是不是有什么特殊之处导致的呢?比如exec族函数会重新fork出进程来执行。
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我觉得你可以先readelf确认下exec是否被加入到了so的PLT中,再反汇编看下对exec的调用是否走了PLT。
另外,你是怎么判断没有hook到exec的?可以在比如my_exec中先创建一个固定名称的空文件,再调用原exec文件,如果文件被创建了,那就说明hook到了。printf不一定靠谱。
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